681428355 has 32 divisors (see below), whose sum is σ = 1108074816. Its totient is φ = 357525504.

The previous prime is 681428339. The next prime is 681428387. The reversal of 681428355 is 553824186.

It is not a de Polignac number, because 681428355 - 2⁴ = 681428339 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 714559 + ... + 715511.

It is an arithmetic number, because the mean of its divisors is an integer number (34627338).

Almost surely, 2^681428355 is an apocalyptic number.

681428355 is a deficient number, since it is larger than the sum of its proper divisors (426646461).

681428355 is a wasteful number, since it uses less digits than its factorization.

681428355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1687.

The product of its digits is 230400, while the sum is 42.

The square root of 681428355 is about 26104.1827108224. The cubic root of 681428355 is about 879.9812130115.

The spelling of 681428355 in words is "six hundred eighty-one million, four hundred twenty-eight thousand, three hundred fifty-five".